Sales Cycle Workflow

sequenceDiagram
    participant U as User
    participant Q as Quote
    participant SO as Sales Order
    participant PI as Proforma
    participant I as Invoice
    participant P as Payment

    U->>Q: Create quote
    Q->>Q: Send to customer
    Q->>SO: Convert to order

    alt Advance required
        SO->>PI: Create proforma
        PI->>P: Record payment
        P-->>PI: Paid
    end

    SO->>I: Create invoice

    alt Proforma exists
        I->>PI: Deduct advance
    end

    I->>P: Record payment
    P-->>I: Paid